Dear Ms. Zaccagnini,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Subject Index to Correspondence and Case Files, 1903 - 3/31/1957 (Microfilm Publication T458) in the Records of the Immigration and Naturalization Service (Record Group 85) that serves as an index to part of the Subject and Policy Files, 1906 - 1957 in Record Group 85, which may include a record of the BSI appeal hearings for the passengers of the Liguria in 1904. For access to these records, please contact the National Archives at Washington DC - Textual Reference (RDT1) via email at email@example.com.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
Please note that not all of the BSI related files survive. Records from most ports were destroyed years ago. Today, files exist only for cases appealed to INS headquarters in Washington, DC. There is usually no surviving record for non-appealed exclusion hearings, which made up the majority of cases. In this case, the entry on the manifest would be the only documentation that exists related to the BSI action.
We hope this is helpful. Best of luck with your research!